<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <el-table :data="roleslist" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              v-for="(item, i1) in scope.row.children"
              :key="item.id"
              :class="['bdbottom',i1==0?'bdtop':'','vcenter']"
            >
              <!-- 一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item.id)">{{ item.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 二级与三级 -->
              <el-col :span="19">
                <el-row
                  :class="['bdbottom',i1==0?'bdtop':'','vcenter']"
                  v-for="(item2, i2) in item.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row,item2.id)"
                    >{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                      type="danger"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                    >{{ item3.authName }}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="描述"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- tree 树形控件 -->
      <el-tree
        :data="rightslist"
        show-checkbox
        default-expand-all
        :default-checked-keys="defKeys"
        node-key="id"
        :props="treeProps"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      roleslist: [],
      setRightDialogVisible: false,
      rightslist: [],
      treeProps: {
        children: "children",
        // 树形控件的绑定对象
        label: "authName"
      },
      defKeys: [],
      // 即将分配权限的Id
      roleId: ""
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status != 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.roleslist = res.data;
      //   console.log(this.roleslist);
      this.$message.success("获取数据成功");
    },
    //根据id 删除对应 的数据
    async removeRightById(role, rightId) {
      // 弹框提示是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      role.children = res.data;
    },
    // 展示分配权限的dialog
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败");
      }
      this.$message.success("获取数据成功");
      this.rightslist = res.data;

      this.getLeafkeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    // 通过递归的方式获取第三权限的数组 保存到defKeys中
    getLeafkeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach(item => {
        this.getLeafkeys(item, arr);
      });
    },
    // 监听dialog 关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败");
      }
      this.$message.success("分配权限成功");
      this.getRolesList();
      this.setRightDialogVisible = false;
    }
  }
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>